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Prove that sin 13pi/3.sin 8pi/3+cos

  1. Prove that sin 13pi/3.sin 8pi/3+cos 2pi/3.sin 5pi /6=1/2.
    1. answers icon 2 answers
    2. Latasha. asked by Latasha.
    3. views icon 3,745 views
  2. Find the linear approximation L(x)of the function f(x)=cos(pi/(6)x) at the point x=1 and use it to estimate the value of
    1. answers icon 1 answer
    2. Amy asked by Amy
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  3. find exact value cos(13pi/15)cos(-pi/5)-sin(13pi/15)sin(-pi/5)
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    2. chris asked by chris
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  4. Given that cos 13pi/18=sin y, first express 13pi/18 as a sum of pi/2 and an angle, and then apply a trigonometric identitiy to
    1. answers icon 3 answers
    2. uwu asked by uwu
    3. views icon 864 views
  5. Given that cos 13pi/18=sin y, first express 13pi/18 as a sum of pi/2 and an angle, and then apply a trigonometric identitiy to
    1. answers icon 1 answer
    2. Vincent asked by Vincent
    3. views icon 1,826 views
  6. How can I solve this questions and get those answers????answers sec 13pi/4=? =>-�ã(2) csc 13pi/4=? =>-�ã(2) sec (-pi/6)=?
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    2. MELEK asked by MELEK
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  7. Please help!Find the point where the curve r(t) = (12sint)i -(12cost)j +5k is at a distance 13pi units along the curve from the
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    2. Chris asked by Chris
    3. views icon 797 views
  8. what is the exact value of tan- 13pi/6
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    2. Anonymous asked by Anonymous
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  9. sin 20 picos 9 pi cos 13pi/2 sin(-17 pi0 are all of these undefined?
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    2. jim asked by jim
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  10. How do you find the exact value of Sin(13pi)?
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    2. George asked by George
    3. views icon 2,067 views